From: Bruce Allan Date: Fri, 13 May 2011 07:19:42 +0000 (+0000) Subject: e1000e: disable far-end loopback mode on ESB2 X-Git-Tag: v3.1-rc1~316^2~450^2~25 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d9b24135b972ccdd5f5174fba06c730e895e6daf;p=pandora-kernel.git e1000e: disable far-end loopback mode on ESB2 The ESB2 LAN includes a debug feature that enables far-end loopback (FELB) of the SerDes/Kumeran interface. This feature is activated when receiving a sequence of symbols that includes a reserved codeword. On a perfect link, FELB would never be activated. In the presence of bit errors, there is a very small, but non-zero, probability of FELB being activated. If the FELB is activated, the SerDes link becomes non-functional and must be reset. It could also corrupt the switching tables in the switch since the ESB2 is transmitting packets with a different source MAC address. This patch disables the FELB feature. Signed-off-by: Bruce Allan Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- Reading git-diff-tree failed